Smarthome Ear O Clip Pliers Clamping Tool/CV Boot Coolant Air Hydraulic Hose Pincers Ear Clamp Pincers. Size: 9 Inch. Designed for all types of ear and O clamps. For installing clamps on: Fuel filters, water pumps, coolant hoses, CV Joints, hydraulic's etc. Suitable for installation of certain clamps on fuel filters, water pumps and other cooling system hoses